[Shazaam!]

Cheers Pat, I'll use 26 mm as a starting point to update my table for 15 mm MC's when I get a chance.

https://www.ducati.org/forums/1098-1198/64806-aftermarket-clutch-slave-cylinder.html#post811841

 

[Shazaam!]

It could be that Ducati kept the 25 mm slave size that they used on previous 12 and 13 mm masters but that would mean that the lever pull would increase for the 15 mm radial pumps — although not as much as the Brembo 16 mm pumps.

To complicate things, the radial pumps use a smaller fulcrum-to-piston distance of 18 mm. The fulcrum-to-piston distance affects two things: the amount of force needed at the lever, and the distance that the lever needs to be pulled through. The radials get about a 10% lighter and longer lever pull than the earlier non-radials for the same slave size.